MATLAB EEGLAB is a great tool to work with EEG signals. I was trying to do emotion recognition with the famous DEAP Dataset, where there are 32 subjects data.

The problem I am facing is that, after doing my preprocessing pipeline I don't know how to label the preprocessed data according to the emotions given in a csv file, valence, arousal or dominance.

My supervisor told me to segment each of the subjects eeg data according to the labelling(like 0 for valence, 1 for arousal). I am not able to understand.

Please anyone help me.

I am attaching the participants rating csv file. There is a column named 'start_time', can anybody explain?